RF3.1 Osteoarthritis progression in patients with mild to moderate osteoarthritis undergoing arthroscopic surgery for femoroacetabular impingement syndrome – minimum 10-year follow-up.
Bibliographic record
Abstract
Abstract Background A strong correlation between femoroacetabular impingement syndrome (FAIS) and the future development of osteoarthritis (OA) has been previously established. A recent study reported that, for patients with FAIS and no OA, arthroscopic surgery resulted in a 42% relative risk reduction in OA progression compared to non-surgical treatment. However, knowledge remains limited regarding the effect of surgery on OA progression in patients with mild to moderate OA. Purpose To evaluate OA progression in patients with mild to moderate OA undergoing arthroscopic surgery for FAIS at minimum 10-year follow-up. Study design Prospective cohort study Methods Sixty patients (65 hips), with a mean age 52.8 years, SD 8.1, underwent arthroscopic surgery for FAIS between 2011 and 2012. All hips had mild to moderate OA, classified as Tönnis grade 1 (57%) or grade 2 (43%). The cohort was 75% male. Patients were evaluated preoperatively and at minimum 10-year follow-up (mean 10.3 years, SD 0.8) using plain anteroposterior hip radiographs and graded with the Tönnis classification. Subjective hip function and quality of life was assessed using the International Hip Outcome Tool 12 (iHOT-12) and EuroQol-5 Dimension (EQ-5D), respectively. The Wilcoxon signed-rank test was used to analyze the patient-reported outcome scores. Results Twenty-nine hips (44.6%) underwent total hip arthroplasty (THA) at a mean of 7.1 years, SD 1.5. Among hips that did not undergo THA, OA progression to Tönnis grade 3 occurred in three cases (8.3%) from grade 1 and in one case (2.8%) from grade 2. For patients not undergoing THA, iHOT-12 scores improved from 39.8, SD 13.8, to 70.1, SD 21.2, p < 0.05, and EQ-5D scores increased from 0.823, SD 0.102, to 0.884, SD 0.129, p < 0.05. A total of 68% of patients exceeded the minimal important change (MIC) threshold of 15 points for iHOT-12. Conclusion Patients with mild to moderate OA undergoing arthroscopic surgery for FAIS demonstrated longevity of the native hip, with a 44,6% conversion rate to THA at a mean of 7.1 years. Patients who did not undergo THA exhibited significant improvements in subjective hip function and quality of life, and relative low OA progression rate.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".